<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="good in cartGoods" :key="good.id">
          <li class="cart-list-con1">
            <!--
                当前的v-model出现了脏数据的问题
                不能使用v-model
                v-model不支持计算属性传参

                v-model后只能跟在vue中定义的数据
            -->
            <input  type="checkbox" name="chk_list"
                    :checked="good.isChecked === 1"
                    @change="changeChecked(good)">
          </li>
          <li class="cart-list-con2">
            <img :src="good.imgUrl">
            <div class="item-msg">{{good.skuName}}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{good.skuPrice}}</span>
          </li>
          <li class="cart-list-con5">
            <a href="javascript:void(0)" class="mins" @click="updateNumFn(good,-1)">-</a>
            <!--当前的v-model出现了脏数据的问题-->
            <input autocomplete="off" type="text"
                   @input="valVerify"
                   @change="updateNumFn(good,$event.target.value*1 -good.skuNum,$event)"
                   minnum="1" class="itxt" :value="good.skuNum">
            <a href="javascript:void(0)" class="plus" @click="updateNumFn(good,1)">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{good.skuNum * good.skuPrice}}</span>
          </li>
          <li class="cart-list-con7">
            <a href="javascript:;" class="sindelet" @click="del(good)">删除</a>
            <br>
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="checkAll">
        <span> 全选</span>
      </div>
      <div class="option">
        <a href="javascript:;" @click="delAllChecked">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择
          <span style="color: deeppink;font-weight: bold">{{totalNum}}</span> 件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{totalPrice}}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="/Trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {mapActions,mapState,mapGetters} from "vuex"
export default {
  name: 'ShopCart',
  computed:{
    ...mapState({
      cartGoods:state=>state.cart.cartGoods
    }),
    ...mapGetters(["totalNum","totalPrice"]),
    //全选全不选
    checkAll:{
      get(){
        return this.$store.getters.checkAll
      },
      async set(newVal){
        // newVal: 全选按钮的最新状态
        try{
          await this.checkAllFn(newVal)
          //当代码执行到当前行 代表checkAllFn执行成功
          //将数据库中最新的数据同步到仓库
          this.getGoodsFromCart()
        }catch (e) {
          alert("全选操作失败")
        }
      }
    }
  },
  methods:{
    ...mapActions(["getGoodsFromCart","delGoodsFromCart","addGoodsToCart",
      "updateCheckedForCartGood","checkAllFn","delAllCheckedFn"]),
    //改变对应数据的选中状态
    async changeChecked(good){
      //对应商品的id
      const skuId = good.skuId;
      //将对应商品选中状态变为哪个值 0:不选中 1:选中
      const isChecked = good.isChecked === 1 ? 0 : 1;

      try {
        const error = await this.updateCheckedForCartGood({skuID:skuId,isChecked});
        if(error){
          alert("勾选操作失败")
        }else{
          //重新请求购物车数据
          this.getGoodsFromCart()
        }
      }catch (e) {
        alert("网络异常")
      }
    },
    //实现单个删除功能
    async del(good){
      if(window.confirm(`是否删除${good.skuName}`)){
        //转发action 进而去发送请求
        try{
          await this.delGoodsFromCart(good.skuId)
          this.getGoodsFromCart()
        }catch (e) {
          //请求成功了 但删除操作出了异常
          alert(e.message)
        }
      }
    },
    //删除所有选中的商品
    async delAllChecked(){
      if(window.confirm(`是否删除`)){
        try{
          await this.delAllCheckedFn()
          this.getGoodsFromCart()
        }catch (e) {
          alert(e.message)
        }
      }
    },
    //更新购物车商品的数量
    async updateNumFn(good,updateNum,event){

      //updateNum: $event.target.value*1 -good.skuNum
      // 当对应商品的总数量 >= 1 时 我们才需要去发请求
      //总数量  $event.target.value*1
      const total = updateNum + good.skuNum;
      if (total >= 1){
        //updateNum : 代表的是新增或减少的数量
        const error = await this.addGoodsToCart({skuid:good.skuId,skuNum:updateNum})
        if(error){
          alert(error)
        }else{
          //请求成功 并且 新增操作(也有可能是对数量的修改)也成功
          this.getGoodsFromCart()
        }
      }else{
        //能进if说明是在输入框中输入数据的
        //输入了一个小于1的值
        //输入了一个非法的值
        if(event){
          event.target.value = good.skuNum
        }
      }
    },
    // 验证输入框数据的
    valVerify(event){
      let val = event.target.value;
      //命中所有的非数字 以及以0开头的0
      // 000123.abc.7.9  ==> 12379
      let reg = /^0+|\D+/g;
      event.target.value = val.replace(reg,"")
    }
  },
  mounted(){
    this.getGoodsFromCart()
  }
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      &>div {
        float: left;
      }
      .cart-th1 {
        width: 5%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }
      .cart-th2 {
        width: 35%;
      }
      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 15%;

      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        &>li {
          float: left;
        }

        .cart-list-con1 {
          width: 5%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con4 {
          width: 15%;

        }

        .cart-list-con5 {
          width: 15%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 15%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 15%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>
